scripts/setlocalversion

   1 #!/bin/sh
   2 # SPDX-License-Identifier: GPL-2.0
   3 #
   4 # This scripts adds local version information from the version
   5 # control systems git, mercurial (hg) and subversion (svn).
   6 #
   7 # If something goes wrong, send a mail the kernel build mailinglist
   8 # (see MAINTAINERS) and CC Nico Schottelius
   9 # <nico-linuxsetlocalversion -at- schottelius.org>.
  10 #
  11 #
  12
  13 usage() {
  14         echo "Usage: $0 [--no-local] [srctree]" >&2
  15         exit 1
  16 }
  17
  18 no_local=false
  19 if test "$1" = "--no-local"; then
  20         no_local=true
  21         shift
  22 fi
  23
  24 srctree=.
  25 if test $# -gt 0; then
  26         srctree=$1
  27         shift
  28 fi
  29 if test $# -gt 0 -o ! -d "$srctree"; then
  30         usage
  31 fi
  32
  33 scm_version()
  34 {
  35         local short=false
  36         local no_dirty=false
  37         local tag
  38
  39         while [ $# -gt 0 ];
  40         do
  41                 case "$1" in
  42                 --short)
  43                         short=true;;
  44                 --no-dirty)
  45                         no_dirty=true;;
  46                 esac
  47                 shift
  48         done
  49
  50         cd "$srctree"
  51
  52         if test -n "$(git rev-parse --show-cdup 2>/dev/null)"; then
  53                 return
  54         fi
  55
  56         if ! head=$(git rev-parse --verify HEAD 2>/dev/null); then
  57                 return
  58         fi
  59
  60         # If a localversion*' file and the corresponding annotated tag exist,
  61         # use it. This is the case in linux-next.
  62         tag=${file_localversion#-}
  63         tag=$(git describe --exact-match --match=$tag $tag 2>/dev/null)
  64
  65         # Otherwise, default to the annotated tag derived from KERNELVERSION.
  66         #   mainline kernel:  6.2.0-rc5  ->  v6.2-rc5
  67         #   stable kernel:    6.1.7      ->  v6.1.7
  68         if [ -z "${tag}" ]; then
  69                 tag=v$(echo "${KERNELVERSION}" | sed -E 's/^([0-9]+\.[0-9]+)\.0(.*)$/\1\2/')
  70         fi
  71
  72         # If we are at the tagged commit, we ignore it because the version is
  73         # well-defined.
  74         if [ -z "$(git describe --exact-match --match=$tag 2>/dev/null)" ]; then
  75
  76                 # If only the short version is requested, don't bother
  77                 # running further git commands
  78                 if $short; then
  79                         echo "+"
  80                         return
  81                 fi
  82                 # If we are past the tagged commit, we pretty print it.
  83                 # (like 6.1.0-14595-g292a089d78d3)
  84                 if atag="$(git describe --match=$tag 2>/dev/null)"; then
  85                         echo "$atag" | awk -F- '{printf("-%05d", $(NF-1))}'
  86                 fi
  87
  88                 # Add -g and exactly 12 hex chars.
  89                 printf '%s%s' -g "$(echo $head | cut -c1-12)"
  90         fi
  91
  92         if ${no_dirty}; then
  93                 return
  94         fi
  95
  96         # Check for uncommitted changes.
  97         # This script must avoid any write attempt to the source tree, which
  98         # might be read-only.
  99         # You cannot use 'git describe --dirty' because it tries to create
 100         # .git/index.lock .
 101         # First, with git-status, but --no-optional-locks is only supported in
 102         # git >= 2.14, so fall back to git-diff-index if it fails. Note that
 103         # git-diff-index does not refresh the index, so it may give misleading
 104         # results.
 105         # See git-update-index(1), git-diff-index(1), and git-status(1).
 106         if {
 107                 git --no-optional-locks status -uno --porcelain 2>/dev/null ||
 108                 git diff-index --name-only HEAD
 109         } | read dummy; then
 110                 printf '%s' -dirty
 111         fi
 112 }
 113
 114 collect_files()
 115 {
 116         local file res=
 117
 118         for file; do
 119                 case "$file" in
 120                 *\~*)
 121                         continue
 122                         ;;
 123                 esac
 124                 if test -e "$file"; then
 125                         res="$res$(cat "$file")"
 126                 fi
 127         done
 128         echo "$res"
 129 }
 130
 131 if [ -z "${KERNELVERSION}" ]; then
 132         echo "KERNELVERSION is not set" >&2
 133         exit 1
 134 fi
 135
 136 # localversion* files in the build and source directory
 137 file_localversion="$(collect_files localversion*)"
 138 if test ! "$srctree" -ef .; then
 139         file_localversion="${file_localversion}$(collect_files "$srctree"/localversion*)"
 140 fi
 141
 142 if ${no_local}; then
 143         echo "${KERNELVERSION}$(scm_version --no-dirty)"
 144         exit 0
 145 fi
 146
 147 if ! test -e include/config/auto.conf; then
 148         echo "Error: kernelrelease not valid - run 'make prepare' to update it" >&2
 149         exit 1
 150 fi
 151
 152 # version string from CONFIG_LOCALVERSION
 153 config_localversion=$(sed -n 's/^CONFIG_LOCALVERSION=\(.*\)$/\1/p' include/config/auto.conf)
 154
 155 # scm version string if not at the kernel version tag or at the file_localversion
 156 if grep -q "^CONFIG_LOCALVERSION_AUTO=y$" include/config/auto.conf; then
 157         # full scm version string
 158         scm_version="$(scm_version)"
 159 elif [ "${LOCALVERSION+set}" != "set" ]; then
 160         # If the variable LOCALVERSION is not set, append a plus
 161         # sign if the repository is not in a clean annotated or
 162         # signed tagged state (as git describe only looks at signed
 163         # or annotated tags - git tag -a/-s).
 164         #
 165         # If the variable LOCALVERSION is set (including being set
 166         # to an empty string), we don't want to append a plus sign.
 167         scm_version="$(scm_version --short)"
 168 fi
 169
 170 echo "${KERNELVERSION}${file_localversion}${config_localversion}${LOCALVERSION}${scm_version}"